If you are running Lansweeper 6.0 and haven't already, it is recommended that you update to release 6.0.0.22 by following
these instructions. We've fixed some deployment bugs.
If the issue persists, I recommend that you manually test each deployment step in Command Prompt on a problem client machine. Your commands may be generating errors in Windows 8 that are not generated in Windows 7. Only when a command works in Command Prompt will it work in a Lansweeper deployment package as well.